docs: review and improve root README (#10)

Author: devmatteini

README.md

@@ -2,6 +2,41 @@
 
 A [MongoDB](https://github.com/mongodb/node-mongodb-native) toolkit for [Effect](https://github.com/Effect-TS/effect/).
 
+[effect-mongodb](packages/effect-mongodb/README.md) is the core package that provides effectful APIs to work
+with MongoDB.
+
+## MongoDB driver compatibility
+
+We adhere to the [MongoDB driver compatibility](https://www.mongodb.com/docs/drivers/node/current/compatibility/)
+guidelines, so minor releases might break compatibility with older MongoDB servers.
+
+For example, upgrading the Node.js driver from 6.8 to 6.10 will make it incompatible with MongoDB server 3.6.
+
+## Roadmap
+
+- [ ] [@effect-mongodb/services](packages/services/README.md) package to provide Effect services/layers to use with
+  `effect-mongodb`
+
 ## Contributing
 
-Take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) guide.
+Take a look at the [CONTRIBUTING.md](CONTRIBUTING.md) guidelines.
+
+### Found a Bug?
+
+If you find a bug in the source code, you can help us
+by [submitting an issue](https://github.com/doubleloop-io/effect-mongodb/issues/new) to our GitHub Repository. Even
+better, you can submit a Pull Request with a fix.
+
+### Missing a Feature?
+
+You can request a new feature
+by [submitting a discussion](https://github.com/doubleloop-io/effect-mongodb/discussions/new/choose) to
+our GitHub Repository.
+If you would like to implement a new feature, please consider the size of the change and reach out to
+better coordinate our efforts and prevent duplication of work.
+
+## License
+
+`effect-mongodb` is made available under the terms of the MIT License.
+
+See the [LICENSE](LICENSE) file for license details.